Back to results
US 5,438,718 AGranted
Spring units for mattresses and the like
AssigneeSlumberland Holdings Limited
InventorsBernard J. Kelly, Antonio B. Cabeza
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeSlumberland Holdings Limited
InventorsBernard J. Kelly, Antonio B. Cabeza
Estimating the term…
A spring unit for a spring upholstered article such as a mattress or furniture includes a single length of wire defining a single length spring. The single length spring includes a plurality of adjacent coil springs which each have upper and lower coils with each coil spring being joined to adjacent coil springs by wire links which constitute extensions of at least one of the upper and lower coils. The single length spring is sheathed within a sleeve or envelope of cloth to define a sheathed single length spring. The sheathed single length spring is arranged to define adjacent segments of sheathed coil springs in which longitudinal axes of the coil springs in the adjacent segments are substantially parallel to one another. In addition, the upper coils of the coil springs in adjacent segments lye in a substantially common plane and the lower coils of the coil springs in adjacent segments lye in a substantially common plane.
A spring unit for a spring upholstered article such as a mattress or furniture, comprising:
An article of furniture comprising at least one spring unit that includes a single length of wire defining a single length spring, said single length spring being formed as a plurality of adjacent coil springs which each have upper and lower coils, each coil spring being joined to adjacent coil springs by wire links which constitute extensions of at least one of the upper and lower coils, said spring unit also including a sleeve or envelope of cloth in which the single length spring is sheathed, said spring unit being arranged to define adjacent rows of sheathed coil springs in which longitudinal axes of the coil springs in adjacent rows are substantially parallel to one another, the upper coils of the coil springs in adjacent rows lying in a substantially common plane and the lower coils of the coil springs in adjacent rows lying in a substantially common plane.
An article of furniture comprising a first spring unit that includes a single length of wire defining a single length spring, said single length spring being formed as a plurality of adjacent coil springs which each have upper and lower coils, each coil spring being joined to adjacent coil springs by wire links which constitute extensions of at least one of the upper and lower coils, said first spring unit also including a sleeve or envelope of cloth in which the single length spring is sheathed, said first spring unit being folded back and forth upon itself to form adjacent segments of sheathed coil springs in which longitudinal axes of the coil springs in adjacent segments are substantially parallel to one another, the adjacent segments being defined by adjacent rows of sheathed coil springs, the upper coils of the coil springs in adjacent segments lying in a substantially common plane and the lower coils of the coil springs in adjacent segments lying in a substantially common plane, means for joining adjacent segments of sheathed coil springs to one another, a second spring unit joined to and extending around a perimeter of the first spring unit, and a rigid frame extending around the second spring unit.
Dependencies are inferred from the claim text.